In Shen's cooler there are bottles of soda and bottles of water. Shen is going to choose bottles at random from the cooler to give to his friends. What is the probability that he will choose sodas and waters? Round your answer to three decimal places.

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297